A polyphasic taxonomic study was performed to determine the relationships of 10 -like strains isolated mainly from the human respiratory tract in Sweden. Two of the strains formed a separate subgroup on the basis of both their protein contents and their fatty acid contents. However, the overall protein and fatty acid profiles revealed that all 10 strains were highly related. Representative strains of the two subgroups exhibited high DNA binding values (98%) with each other and had an identical DNA base ratio (44 mol% G+C). DNA-rRNA hybridizations revealed that this taxon can be included in the genus , which is only distantly related to phenotypically similar genera, such as the genera and . The results of an extensive phenotypic analysis indicated that the general biochemical profile of the 10 strains conforms with the description of the genus given in . We therefore consider these organisms members of a new species, for which the name is proposed. Furthermore, we also conclude that belongs, genotypically as well as phenotypically, to the genus .


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